| 中水的侵蚀性因子对发电厂凝汽器不锈钢管材的影响 |
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| 引用本文： | 张万友,周定,李进.中水的侵蚀性因子对发电厂凝汽器不锈钢管材的影响[J].中国电机工程学报,2010(8). |
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| 作者姓名： | 张万友 周定 李进 |
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| 作者单位： | 东北电力大学化学工程学院;哈尔滨工业大学市政环境工程学院;北京交通大学市政与环境工程系; |
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| 摘 要： | 以污水处理厂的二级排放水经膜生物反应器、弱酸离子交换树脂处理后回用于电厂循环冷却水系统为背景,研究了其水质中氨氮、化学需氧量(chemical oxygen demand,COD)在蒸发浓缩过程中的转化规律;采用电化学方法、正交实验方法、表面成像分析技术(扫描电镜)研究了氨氮浓度、COD浓度和介质pH值对凝汽器管材316L不锈钢表面耐蚀性的影响。结果表明,蒸发浓缩过程中氨氮约80%以上被硝化和解吸,COD在浓缩初期以线性趋势上升,当水样倍率达到4倍时,COD增长到3.0倍;在试验条件下,氨氮浓度≥18mg/L时,316L不锈钢电极的点蚀电位有明显下降,电极表面达到击穿电位后,表面形成大块黑色腐蚀斑,说明对316L不锈钢耐蚀性能影响显著;介质pH值在8.3~8.5范围内,COD≤300mg/L,氨氮浓度5mg/L对316L不锈钢管的耐蚀性基本无影响。
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| 关 键 词： | 316L不锈钢管 中水 冷却系统 氨氮浓度 化学需氧量(COD)浓度 电化学测量 |
Effect of Corrosive Factors in the Regenerated Water on Stainless Steels of Condenser Tube in Power Plant |
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| ZHANG Wan-you,ZHOU Ding,LI Jin.Effect of Corrosive Factors in the Regenerated Water on Stainless Steels of Condenser Tube in Power Plant[J].Proceedings of the CSEE,2010(8). |
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| Authors: | ZHANG Wan-you ZHOU Ding LI Jin |
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| Affiliation: | ZHANG Wan-you1,ZHOU Ding2,LI Jin3 (1. Chemical Engineering Institute of Northeast DianLi University,Jilin 132012,Jilin Province,China,2. School of Municipal , Environmental Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang Province,3. Department of Municipal , Environmental Engineering,Beijing Jiaotong University,Haidian District,Beijing 100044,China) |
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| Abstract: | This paper demonstrated the reuse of secondary drainage water treated by the membrane bioreactor and weak acid ion exchange resin from sewage treatment plants in circulating cooling water systems of power plants. For the water quality characteristics, the methods of electrochemistry, orthogonal experiment, and surface image analysis technique (scanning electron microscope, SEM) were employed to study the erosion of the main factor in medium, including ammonia concentration, chemical oxygen demand (COD) conc... |
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| Keywords: | 316L stainless steel regenerated water cooling water system ammonia-nitrogen concentration chemical oxygen demand(COD) concentration electro-chemical measurement |
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